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Term Loan and Revolving Credit Facility (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Schedule of debt and short-term borrowings    
Total debt $ 124,219  
Less: Current portion of long-term debt 3,125 3,125
Long-term debt 121,094  
Term loan [Member]
   
Schedule of debt and short-term borrowings    
Total debt 124,219  
Revolving credit facility [Member]
   
Schedule of debt and short-term borrowings    
Total debt